Ground Loop / AC beat on VCR

[themaster1]

Looks like i have a ground loop on my vcr (see here: https://www.avartifactatlas.com/artifacts/ac_beat.html), i get exactly what's on the video on this page (horizontal bars (2) rolling bottom->up)

My equipment is connected to one unique power source (which minimize ground potential disparities i believe), the antenna of the vcr is not connected to any cable.

I've read somewhere that one could make a special cable spilt in 2 with capacitors (?) at both ends and connect to the vcr. Anyway that's hazy at that point for me.

Inputs are welcome

My equipment includes:

PC:
- hdmi capture card connected to a dvd recorder, and audio cables)
- regular SD capture card connected with s-video (the breakout cable/ plug is kinda loose...very old, first thing i'll check tomorrow)

Satellite decoder /dvd recorder /VCR: they're all inter-connected with s-video / composite,audio rca)

Lots of cables to check

[Vidd]

I had a ground loop problem capturing VHS also. I spent hours with different cables and setups.

It turned out the problem was my internet connection. The ground loop was coming from my cable modem and over the ethernet network. I had to disconnect the ethernet and also unplug the cable modem every time I captured. I solved the problem by buying a Jensen Iso-Max VRD, which is a coax Isolator Hum Eliminator.

Internet may not be your problem, but usually the cause of a ground loop is something you don't think of or expect.

[themaster1]

well looks like i have found, indeed it was that loose connector on the capture card